http://www.mini-iac.com/DesktopDefault.aspx?tabid=90
All the rules are on this page.
On the sharks tooth. All corners must be a flown radius, none of the 3 corners have to be the same radius.
I think the rules are closer to IAC then pattern. Figures in IMAC are wind corrected, this would not work with IAC. Even though roll rate is not a criteria, IMAC judges seem to judge the slower rolls better then the fast rolls. This is another area that pattern has influenced IMAC.
In pattern you have to show the break before a snap. IAC and IMAC the break and autorotation
can happen at the same time. This is another area where some IMAC judges don't seem to know the rules. Snaps seem to be the cause of more aurguments then any other topic in aerobatics. The rules seem clear to some but not to others, things like the showing the break, displacement, loaded or unloaded snaps (oh I mean loaded or cheater snaps,lol). Lots of discussion but nothing is ever resolved, it is like a red state/ blue state fight.